POS Server Persistent Weighing Device Connection
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Solution Overview
Problem
Conventional weighing device systems require repeated connection and disconnection with a server for each transaction, making the process cumbersome when multiple commodities are purchased sequentially.
Innovation Solution
A POS system with a server and weighing device that establishes a persistent connection upon initial identification, allowing the server to acquire and register commodity information and maintain communication until instructed to disconnect, eliminating the need for repeated connections during multiple transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection is established between the weighing device and server for each weighed commodity, then commodity information can be acquired and registered, but the operation becomes troublesome when multiple commodities are purchased sequentially
Solution Approach 1:
The server maintains a continuous connection with the weighing device throughout the shopping period, allowing multiple commodity weighings to be performed without repeated connection and disconnection. The connection is established once when the shopping cart is created and maintained until the transaction is completed, enabling seamless acquisition of commodity information for multiple items.
2Ease of operation
If connection is maintained between the server and weighing device throughout shopping, then multiple commodities can be weighed without repeated connections, but connection management becomes more complex
Solution Approach 1:
The system introduces a shopping cart as an intermediary entity that manages the connection lifecycle. The shopping cart stores weighing result information and coordinates communication between the weighing device and server, simplifying connection management while enabling continuous operation throughout the shopping process.
Solution Approach 2:
The weighing device automatically performs weighing operations and transmits results to the server without requiring manual intervention for each transaction. The device self-manages the continuous connection, performing weighings and sending data autonomously, which reduces operational complexity despite maintaining a persistent connection.
Data Source
AI summary
A registration server in a POS system including a weighing device for weighing a commodity sold by weight in a store and a mobile terminal operated by a customer for managing registered commodities, includes a network interface connectable to the weighing device and the mobile terminal, a memory, and a processor. The processor is configured to, upon receipt of identification information identifying the weighing device from the mobile terminal, control the network interface to establish a connection with the weighing device, acquire commodity information indicating the weighed commodity and a weight thereof from the weighing device, register in the memory the weighed commodity as a commodity to be purchased by the customer, control the network interface to output the commodity information to the mobile terminal, and maintain the connection with the weighing device until an instruction for disconnecting the connection is received from the weighing device.